Spring Boot Starter for web3j
Integrate web3j into your Spring Boot applications via Spring's dependency injection.
A sample application is available here
To use, create a new Spring Boot Application, and include the following dependencies:
org.web3j web3j-spring-boot-starter 4.0.3
Now Spring can inject web3j instances for you where ever you need them:
@Autowired private Web3j web3j;
No additional configuration is required if you want to connect via HTTP to the default URL http://localhost:8545.
Otherwise simply add the address of the endpoint in your application properties:
# An infura endpoint web3j.client-address = https://rinkeby.infura.io/
Or, an IPC endpoing
web3j.client-address = /path/to/file.ipc
web3j.admin-client = true
Then Spring can inject admin clients:
@Autowired private Admin admin;
Some Ethereum operations take longer than the default HTTP timeout set by the
OkHttp3library used by
web3j. To configure those timeouts set the web3j
web3j.httpTimeoutSeconds = 600
This sets all three OkHttp3 timeouts:
Valid values are any non-negative integer.
A value of '
0' means: no timeout.
Note: This is not required for transacting with web3j.
For further information on web3j, please refer to the web3j home page.